Ultrasonic angioplasty-atherectomy catheter and method of use
First Claim
1. An ultrasonic device for removing obstructive matter from an anatomical passageway, said device comprising:
- an elongate pliable catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough;
a distal tip member fixedly attached to the distal end of said catheter body for engaging the obstructive matter, the distal tip member having a length selected so that the entire distal tip member is contained within the distal end of the catheter body, said distal tip member having a distal surface;
an ultrasound transmission member extending longitudinally through said catheter body to transmit ultrasound from an ultrasound source located adjacent the proximal end of said catheter body, through said catheter body, to said distal tip member; and
at least one aspiration passageway extending longitudinally through said distal tip member from the proximal surface thereof to the distal surface thereof, said aspiration passageway being in communication with a lumen of said catheter such that matter located at the distal tip member may be aspirated, in the proximal direction, through said passageway and through said lumen of said catheter.
2 Assignments
0 Petitions
Accused Products
Abstract
An ultrasonic device and method for removing obstructive matter from an anatomical structure or passageway (e.g., blood vessel). The device comprises an elongate pliable catheter having a distal tip member attached to the distal end thereof, and an ultrasound transmission member which extends longitudinally therethrough to carry ultrasound from the proximal end of the catheter to the distal tip member. The distal tip member has a concave indentation formed in the distal surface thereof, and at least one inlet passageway extending therethrough in communication with a catheter lumen to facilitate suctioning of severed matter which becomes located within the concave indentation of the distal tip. The device may further incorporate means for infusing fluid (e.g., irrigation fluid, medicaments) separately or concurrently with the aspiration of the severed obstructive matter.
362 Citations
33 Claims
-
1. An ultrasonic device for removing obstructive matter from an anatomical passageway, said device comprising:
-
an elongate pliable catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough; a distal tip member fixedly attached to the distal end of said catheter body for engaging the obstructive matter, the distal tip member having a length selected so that the entire distal tip member is contained within the distal end of the catheter body, said distal tip member having a distal surface; an ultrasound transmission member extending longitudinally through said catheter body to transmit ultrasound from an ultrasound source located adjacent the proximal end of said catheter body, through said catheter body, to said distal tip member; and at least one aspiration passageway extending longitudinally through said distal tip member from the proximal surface thereof to the distal surface thereof, said aspiration passageway being in communication with a lumen of said catheter such that matter located at the distal tip member may be aspirated, in the proximal direction, through said passageway and through said lumen of said catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. A method for removing obstructive matter from an anatomical passageway, said method comprising the steps of:
-
a) providing an ultrasonic catheter device which comprises; an elongate pliable catheter body having a proximal end, a distal end, and at least one lumen extending longitudinally therethrough; a distal tip member fixedly attached to the distal end of said catheter body for engaging the obstructive matter, the distal tip member having a length selected so that the entire distal tip member is contained within the distal end of the catheter body, said distal tip member having a distal surface; an ultrasound transmission member extending longitudinally through said catheter body to transmit ultrasound from an ultrasound source located adjacent the proximal end of said catheter body, through said catheter body, to said distal tip member; at least one aspiration passageway extending longitudinally through said distal tip member from the proximal surface thereof to the distal surface thereof, said aspiration passageway being in communication with a lumen of said catheter such that matter located at the distal tip member may be aspirated, in the proximal direction, through said passageway and through said lumen of said catheter; b) inserting said catheter body into said anatomical passageway wherein the obstructive material is located; c) advancing said catheter body to a point where said distal tip member is located adjacent the obstructive matter to be removed; d) passing ultrasound through said ultrasound transmission member through said distal tip member, thereby causing said distal tip member to undergo ultrasonic vibratory movement; e) advancing said catheter body such that the distal surface of said distal tip member comes into contact with said obstructive matter, and such that the ultrasonic vibratory movement of said distal tip member facilitates severance of a portion of said obstructive matter; and f) causing a severed portion of said obstructive matter to be aspirated in the proximal direction, through said aspiration passageway, and through a lumen of said catheter body. - View Dependent Claims (31, 32, 33)
-
Specification